GAS TANK VAPOR SENSOR

first of all, did you get a real diag?? you need a scan tool, smoke machine and a volt meter to determine the evap part failure. Do you mean the pressure sensor?? if so, it is part of the fuel pump module and can get pricy. Roy

often this will happen if gas cap isn't properly secured... try diconecting battery for minute to reset 'brain" then reconnect after being sure the gas cap is tight. happes to Toyotas a lot.